Grayscale Bitcoin Trust ($GBTC) is currently the largest listed cryptocurrency asset with $30.17 billion in assets under management. The firm currently holds more than 655,730 BTC and the security is tradable in the United States through over-the-counter markets.
The fund was launched in 2013 and the Grayscale Bitcoin Trust became the preferred institutional vehicle in the U.S. for BTC due to the lack of a Bitcoin exchange-traded fund (ETF).